5577

5211

كارشناسي ارشد

سازه

اصفهان: دانشگاه صنعتي اصفهان، دانشكده عمران

1388

ده،127ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مهدي ابطحي

داود مستوفي نژاد

5/10/89

محمد شكرچي زاده، امير مهدي جلبيان

مهندسي عمران

ID5211

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Experimental Evaluation of Fiber Reinforced Concrete Slabs under Blast Loading Sayyed Mohsen Ghafelehbashi Mohsen ghafelehbasi@cv iut ac ir 22 June 2010 Department of Civil Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Sayyed Mahdi Abtahi mabtahi@cc iut ac ir Abstract The explosive load is one of the dynamic loads on structures which has been considered as an important issue in strengthening studies of structures due to increased military attacks and terrorist incidents and unexpected events in industry and transportation in recent decades Accordingly the first factor retrofit buildings are to apply the materials with high energy absorption and toughness Today concrete as the highest consumption among man made materials has found many applications in building structures However the concrete has weaknesses against tensile bending and dynamic loads including explosive Accordingly there are extensive researches for improving the concrete in these areas In this context increased energy absorption and toughness in the concrete by reinforced concrete with fibers is one of the best methods The aim of this research is to compare the toughness cracking and damage of concrete reinforced fiber slabs with steel glass polypropylene and its hybrids under blast loading Also the effect of other factors such as mix design aggregate ratio and slab thickness is measured for resistance evaluation of samples under explosive Slab dimensions is 500 500 mm with a thickness of 50 and 75 mm water cement ratio is considered 0 45 for all samples but the ratio of sand gravel and cement has been selected variable Fiber volume percent used in this work is 0 5 to 1 5 for steel fiber 0 1 to 1 2 for polypropylene fiber and 0 2 to 1 2 for glass fiber Apart from individual fibers is also used in hybrid steel polypropylene and glass polypropylene fiber with different volume percentages The results of this research have shown that steel fiber has the better effects on the concrete resistance against blast loading in comparison with use of glass and polypropylene fibers Furthermore it has been shown that the use of polypropylene steel Hybrid fiber reinforced concrete decreases the cost and improves the resistance against blast loading Key Words Fiber Reinforced Concrete Explosive S

مهدي ابطحي

داود مستوفي نژاد

محمد شكرچي زاده، امير مهدي جلبيان